Re: Is there a line of defense against Distributed Reflective attacks?

["Christopher L. Morrow" <chris () UU NET>]

On Thu, 16 Jan 2003, hc wrote:

> > Because syn cookies are available on routing gear??? Either way syn
> > cookies are not going to keep the device from sending a 'syn-ack' to the
> > 'originating host'.
> True.. At least it will have some stop in the amount of attacks.
>
> It is quite unfortunate that it is impossible to control the 'ingress'
> point of attack flow. Whenever there is a DoS attack, the only way to
> drop it is to null route it (the method you have devised) over BGP
> peering, but that knocks the victim host off the 'net... :-(

Sure, but this like all other attacks of this sort can be tracked... and
so the pain is over /quickly/ provided you can track it quickly :) Also,
sometimes null routes are ok.